Bump django-filter from 2.0.0 to 2.3.0 in /cvat/requirements (#1723)

Bumps [django-filter](https://github.com/carltongibson/django-filter) from 2.0.0 to 2.3.0.
- [Release notes](https://github.com/carltongibson/django-filter/releases)
- [Changelog](https://github.com/carltongibson/django-filter/blob/master/CHANGES.rst)
- [Commits](https://github.com/carltongibson/django-filter/compare/2.0.0...2.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

cvat/requirements/base.txt

@@ -26,7 +26,7 @@ django-revproxy==0.9.15
 rules==2.0
 GitPython==3.1.3
 coreapi==2.3.3
-django-filter==2.0.0
+django-filter==2.3.0
 Markdown==3.2.2
 djangorestframework==3.11.0
 Pygments==2.6.1